section highlight (background) color

Hello,
I tried different forums of the theme (betheme) and of envato, nobody could help.
I am almost done with a website, but I would like to have different highlight section colors on each site. With the betheme I can only set one color for the highlight sections.
I tried to add a custom css to change that, but I am not sure what to use for the section.

This didnt work:

section-highlight {
background: #e5c8c4;
}

I hope someone can help me with the css!